Statistical Decision Techniques

Sachs, Lothar

doi:10.1007/978-1-4612-5246-7_4

Cited by 14 publications

(15 citation statements)

References 146 publications

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“…This means that an increased deuterium excess represents an increased continental moisture contribution and a decreased deuterium excess indicates secondary evaporation. The LMWL for central Vietnam is: δ 2 H = (8.6 ± 0.3‰) × δ 18 O + (15 ± 2‰) with an r 2 of 0.98 (n = 54) calculated following Sachs et al 71 . We calculate the LMWL for each season and find that during autumn, spring and winter, the LMWL slope is increased by 0.5‰ and the intercept by 5.6‰ compared to the GMWL (Fig.…”

Section: Resultsmentioning

confidence: 99%

Rainwater isotopes in central Vietnam controlled by two oceanic moisture sources and rainout effects

Wolf

Roberts

Ersek

et al. 2020

Sci Rep

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The interpretation of palaeoclimate archives based on oxygen isotopes depends critically on a detailed understanding of processes controlling the isotopic composition of precipitation. In the summer monsoonal realm, like Southeast Asia, seasonally and interannually depleted oxygen isotope ratios in precipitation have been linked to the summer monsoon strength. However, in some regions, such as central Vietnam, the majority of precipitation falls outside the summer monsoon period. We investigate processes controlling stable isotopes in precipitation from central Vietnam by combining moisture uptake calculations with monthly stable isotope data observed over five years. We find that the isotopic seasonal cycle in this region is driven by a shift in moisture source from the Indian Ocean to the South China Sea. This shift is reflected in oxygen isotope ratios with low values (− 8 to − 10‰) during summer and high values during spring/winter (0 to − 3‰), while 70% of the annual rainfall occurs during autumn. Interannual changes in precipitation isotopes in central Vietnam are governed by the timing of the seasonal onset and withdrawal of the Intertropical Convergence Zone, which controls the amount of vapour contributed from each source.

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Section: Resultsmentioning

confidence: 99%

Rainwater isotopes in central Vietnam controlled by two oceanic moisture sources and rainout effects

Wolf

Roberts

Ersek

et al. 2020

Sci Rep

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“…Differences in classification or rating between the authors were documented and discussions held to resolve the conflicts until unanimous agreement was reached. The percentage of studies with positive results in the three groups of studies was compared using a χ 2 test for homogeneity [32]. …”

Section: Methodsmentioning

confidence: 99%

Reexamination of a Meta-Analysis of the Effect of Antioxidant Supplementation on Mortality and Health in Randomized Trials

et al. 2010

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A recent meta-analysis of selected randomized clinical trials (RCTs), in which population groups of differing ages and health status were supplemented with various doses of β-carotene, vitamin A, and/or vitamin E, found that these interventions increased all-cause mortality. However, this meta-analysis did not consider the rationale of the constituent RCTs for antioxidant supplementation, none of which included mortality as a primary outcome. As the rationale for these trials was to test the hypothesis of a potential benefit of antioxidant supplementation, an alternative approach to a systematic evaluation of these RCTs would be to evaluate this outcome relative to the putative risk of greater total mortality. Thus, we examined these data based on the primary outcome of the 66 RCTs included in the meta-analysis via a decision analysis to identify whether the results provided a positive (i.e., benefit), null or negative (i.e., harm) outcome. Our evaluation indicated that of these RCTs, 24 had a positive outcome, 39 had a null outcome, and 3 had a negative outcome. We further categorized these interventions as primary (risk reduction in healthy populations) or secondary (slowing pathogenesis or preventing recurrent events and/or cause-specific mortality) prevention or therapeutic (treatment to improve quality of life, limit complications, and/or provide rehabilitation) studies, and determined positive outcomes in 8 of 20 primary prevention studies, 10 of 34 secondary prevention studies, and 6 out of 16 therapeutic studies. Seven of the eight RCTs with a positive outcome in primary prevention included participants in a population where malnutrition is frequently described. These results suggest that analyses of potential risks from antioxidant supplementation should be placed in the context of a benefit/risk ratio.

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“…In the cases under consideration, the values of the dispersion of averages DAv St were computed with Eq. 1, for a number of degrees of freedom nx = 219, and tcr a critical value of the Student's t test tcr = 1.9685 (for a significance level  = 0.05) (Sachs 1984). The obtained value of the dispersion of averages were as follows: for a new band saw (Fig.…”

Section: Resultsmentioning

confidence: 94%

“…where tcr is a critical value of the Student t test (Sachs 1984), s(x) is a coefficient of variation, and nx is a number of degrees of freedom. In the cases under consideration, the values of the dispersion of averages DAv St were computed with Eq.…”

Section: Resultsmentioning

confidence: 99%

Capacity of surface production of band sawing in manufacture of oak floor upper layers

Orłowski

Chuchała

Stenka

et al. 2023

BioRes

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Thin lamellae, corresponding to the layer components of structural glued members, i.e., 2-ply or 3-ply glued flooring, can be manufactured in re-sawing operations of kiln-dried wood blocks or in wet technologies, which currently seem to be more common because of the shorter drying time. The re-sawing process in wet technology is conducted on dedicated thin-cutting band sawing machines with stellite-tipped band saws. The goal of this research was to demonstrate the capacity of surface production (m2/ tool life) of visible layers of oak engineered flooring composites in a function of both a new band saw and a re-sharpened band saw blade. Additionally, the state of teeth of each band saw blade was examined at the end of the tool life. A series of cutting tests were performed in sawmill production conditions. The conducted tests revealed that a three times higher capacity of surface production was obtained for the new tool compared to re-sharpened tool. Additional microscopic observations of some re-sharpened teeth showed deformed plastic characteristics.

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Statistical Decision Techniques

Cited by 14 publications

References 146 publications

Rainwater isotopes in central Vietnam controlled by two oceanic moisture sources and rainout effects

Rainwater isotopes in central Vietnam controlled by two oceanic moisture sources and rainout effects

Reexamination of a Meta-Analysis of the Effect of Antioxidant Supplementation on Mortality and Health in Randomized Trials

Capacity of surface production of band sawing in manufacture of oak floor upper layers

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